MIA88LA147

NTSB accident investigation · Air Tractor AT-301 · Hastings, FL · April 14, 1988

Accident · Minor injuriesLimited investigationFinal report
Date
April 14, 1988, 11:00 local (15:00 UTC)
Place
Hastings, FL
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N8841SAir Tractor AT-301
Weather
Visual (VMC) · Day
Status
Completed · report March 13, 1989
Report
Approved by Office Director
FAA report
19880414044839A
Case key
32163

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(partial) - mech failure/malfTakeoff - initial climb
Engine assembly,rocker arm/tappet - failure,totalCause
Engine assembly,valve,exhaust - disabledCause
Load jettison - performedPilot in command
Forced landingDescent - emergency
Nose overLanding - flare/touchdown
Terrain condition - softFactor
Terrain condition - crop

Analysis

While on an aerial application flt shortly after takeoff, the eng lost power. The plt then dumped the load of fertilizer & landed the acft in a field. After touchdown it nosed over & came to rest. Examination of the eng revealed that the no. four cylinder exhaust valve rocker arm support failed preventing the valve from opening. As a result of the excess pressure inside the cylinder when the intake valve opened. The exhaust was forced through the intake system resulting in eng backfiring.

Aircraft

Registration
N8841S
Reported as
Air Tractor AT-301
Category
Airplane
Serial number
301-0212
Airframe hours
4,680
Engine
P&W R-1340-53HL, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Lee Inmon
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · September 23, 1987 · 191 hours before

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
40
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
12,844 total · 500 in this make and model · 12,590 as pilot in command · 110 in the last 90 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 6 knots
Visibility
7 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 48 °F
Altimeter
30.00 inHg
Observed at
CRG, 40 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N8841S · 2

Matched to the same aircraft by N-number and date.